Birdkids - The Bateleur Expander
Birdkids - The Bateleur Expander - lets you access the individual inputs and functions of the oscillator. The Bateleur is one of the most solid sounding thru-zero analog VCO's out there, which need no further adjustment in your mix "to get it right".
The Bateleur is expanded with the Birdkids - The Bateleur Expander module to include more functions for it's filter and VCO and it now even has VCA funtions. Now it is possible to control the resonance which is only switchable on the main module and with the expander you can use the internal VCA finally to create a VCO-VCF-VCA voice.
Filter: The Resonance potentiometer allows for setting the filter resonance manually. If a CV is plugged to the resonance CV input, this control turns into it's attenuator.
There's also a scalable CV input for modulating the cutoff frequency.
VCO: An exponential FM input with attenuator. It is an addition to the VCO's lineaar and Thru-Zero inputs.
VCA: full fledged VCA including an input with level control, an output and a CV input with attenuator.